I have compiled xapian on Athlon-XP which supports only SSE and not SSE2. When used with app-text/notmuch it failed with "Illegal instruction". Disabling use of SSE (with --disable-sse passed to configure) solves the issue, but disabling it should conditional, of course. Reproducible: Always
Actually there's an option to use sse only rather than sse2 which is the default. From ./configure --help --disable-sse disable use of SSE FP instructions on x86 --enable-sse[=sse|sse2] set which SSE FP instructions to use on x86 (default: sse2) So I should set use flags for those with IUSE="+sse2" for the default. I think I'll have USE="nosse" for --disable-sse, USE="sse" for --enable--sse=sse and USE="sse2" for --enable-sse=sse2. "nosse" "sse" and "sse2" will be mutually exclusive. @aidecoe, if you have a chance, can you test --enable-sse=sse and see if app-text/notmuch still fails? I've also noticed that there's some other stuff: --enable-documentation enable make rules to rebuild documentation [default=maintainer-mode] --enable-backend-brass build the brass database backend [default=yes] --enable-backend-chert build the chert database backend [default=yes] --enable-backend-flint build the flint database backend [default=yes] --enable-backend-inmemory build the inmemory database backend [default=yes] --enable-backend-remote build the remote database backend [default=yes] I should add some local use flags for these.
(In reply to comment #1) > Actually there's an option to use sse only rather than sse2 which is the > default. From ./configure --help > > --disable-sse disable use of SSE FP instructions on x86 > --enable-sse[=sse|sse2] set which SSE FP instructions to use on x86 > (default: sse2) > > So I should set use flags for those with IUSE="+sse2" for the default. I think > I'll have USE="nosse" for --disable-sse, USE="sse" for --enable--sse=sse and > USE="sse2" for --enable-sse=sse2. "nosse" "sse" and "sse2" will be mutually > exclusive. Maybe just "sse" and "sse2"? "nosse" is redundant, I think. > @aidecoe, if you have a chance, can you test --enable-sse=sse and see if > app-text/notmuch still fails? I cannot at this time. x86 host has gone down for today and I'm going away for few days. Although I'm almost sure that "sse" would work for that host (Athlon-XP supports SSE).
I added xapian-1.2.7-r2.ebuild. Please test.
Hey and thanks for the assistance. I think you forgot to attach the ebuild?
(In reply to comment #4) > Hey and thanks for the assistance. I think you forgot to attach the ebuild? Its on the tree so I didnt' attach it here. If you emerge --sync you'll see dev-libs/xapian-1.2.7-r2. Its ~arch for now. The only thing that bothers me a little about it is that most systems have both USE="sse sse2" so you get the warning. Its just a warning, but some might think to act on it. We may want to soften the statement and add something to the effect, "On x64_64 systems, you most likely have both flags enabled, in which case this behavior is what you want" after my statement that its defaulting to USE="sse2". It might be overkill to ask them to look into /proc/cpuinfo to check for available cpu flags. Let me know what you think.
Can this be closed? I'm trying to clear the way for stabilization of 1.2.7 so we can get rid of some older cruft.
LGTM!
Please reopen if there's a problem with this.
